The Montreal service center took one look at my ph...

The Montreal service center took one look at my phone and stated that they see that damage all the time and that the pink line down the screen was a known defect in Samsung S 6 Egde screen's. Told me to come back in 2 hrs and all would be repaired. I came back and then they told me nothing was covered as the phone was tampered with, they couldn't explain how or why and when I asked for it on writing the girl started to laugh at me and then presented me with a bill for $950 dollars raising her voice humiliating me in front of the store. What kind of customer service is this? Why don't they just train their employees so they actually know what they are talking about instead of childishly threatening large bills and laughing at you.
I spoke to Samsung Executive relations and they stated I could send my phone in. Now it's at Futuretel ON, and they won't fix it either but now they stated it's $650 to fix or $30 to send back. If I don't claim it in 30 days then they use it for spare parts. They only called me after keeping phone for 4 weeks! I've been desperately calling them over and over non stop and no one has answered or called me back. I've emailed them and nothing! Please, I spent $1000 on my Samsung S6 edge, just give me my phone back! This is a nightmare